Pulverizer



Jan. 1, 1924 1,479,541

P. A. HIRSCH PULVERIZER Filed July 5, 1922 Hi 5 2/ Z WWW J5 ZZ 5 1 NJ Ili J 7 [Z 1Z1 w Mi M Z4 115K017 5 Patented Jan. 1, 1924.

UNITED STATES PATENT OFFICE PAUL ARTHUR HIBSCH, OF ERIE, PENNSYLVANIA,ASSIGNOR TO FURNACE ENGINEER- N. Y., A CORPORATION OF NEW YORK.

To all whom it me column, or NEW YORK,

PULVERIZER.

Application filed July 8, 1922. Serial No. 572,582.

may 0071,06?

Be it known that 1, PAUL A. Hmson, a

citizen in the county of Erie Vania, have invented new provements 1nPulverlzers,

of Great Britain, residin at Er1e,

and State 0 Pennsyland useful Imof which the following is aspecification.

This invention relates to pulverizers used in pulverizin moreparticularly fuel where the fuel is carried directly with t e air goingthrough the pulverizer to a furnace for combustion. In carrying out thelnventlon the inventionv is simplified by forming the pulverizer with avertical axis and feeding the material at the top.

This simplifies the construction and makes a more satisfactory operationin many respects. this '1 preferably mount a In accomplishing tube atthe axis of the pulverizer and feed the material through this tubedelivering it to the pulverlzing apparatus at the bottom.

The material, therefore has the benefit of gravity in retaining thecoarser particles in the pulverizer as against the draft of air movingthe verized particles. vention will appear pul- Other features of theinfrom the specification and claims.

The

Fig.

verizer, partly Fig. Fig. Fig.

invention is.illustrated in the accomlows 1 shows an elevation of thepulin section.

2 a section on the line 2-2 in Fig. 1. 3 a section on the line 3-3 inFig. 1. 4 a section on the line 44 in Fig. 1.

1 marks the shell of the pulverizer, 2 a bottom plate on which the shellis mounted,

and 3 legs on which the bottom plate is mounted.

The

pulverizing chamber 5, and

6, all

a breaker chamber 4, a fan chamber arranged within the shell 1. The

pulverizer has the fan chamber through an opening 8 and the fan chamberdischarges at 9.

A shaft 10 is journaled in a bearing 11 carried by the bottom plate andby a bearing 12 ing 12 der 13 at the top of the pulverizer, thebearcomprising the balls 12 and shoulforming the thrust bearing forcarrying the wei ht of the shaft and attached parts. The earin 12 iscarried by a frame 14 resting on the s ell 1.

' A tube 15 has the inwardly extending arms 16 which are fixed on theshaft 10. A hopper 17 leads to the upper end of the tube 15. At thelower end of the tube 15 there is a deflecting plate in the form of acone 18 which deflects the material outwardly into the breaker chamber4. The breaker is formed with the paddles 19 carried by adisc 20, thedisc 20 being secured to the tube 15. The pulverizer beaters have theaddles 21 carried by discs 22 and these are a so mounted on the tube 15and operate in connection with an impact surface 23 arranged within theshell 1. A restricting plate 24 is placed between the chambers 4 and 5restricting the opening 7 to a diameter less than the diameter of thediscs 20 and 22 and also coming within the inner edge of the paddles 19.Restricting plates 25 restrict the diameter of the passage 8 between thepulverizing chamber and the fan chamber.

In order to obstruct the rotary motion of the material at the dischargeof the pulverizer I place radially arranged plates 26 in the passage 8,being a portion of the annular space between the chamber casing 1, andthe delivery tube 15. This tends to prevent the coarser material leavingthe pulverizer. Such materials striking these plates is brought backinto the pulverizer and subjected to further action.

The fan 27 is carried by a hub 27 on the tube 15 and draws air throughthe tube 15, breaker chamber, pulverizer chamber and discharges the airand pulverized material through the opening 9. In order to supplementthe air drawn through the pulverizer I provide an opening 27 in theupper part of the fan chamber 6.

What I claim as new is 1. In a pulverizer, the combination of a verticalpulverizer chamber; rotating beaters in said chamber having a verticalaxis; and a delivery tube within the beaters extending from the top ofthe chamber and delivering the material to the heaters at the bottom ofthe chamber; and whirl-obstructing vanes above said heaters, extendingsubstantially horizontally across the annular space between the chambercasing and the delivery tube.

2. In a pulverizer, the combination of a vertical pulverizer chamber; avertical shaft mounted in the chamber; a delivery tube carried by theshaft; and beaters mounted on the tube; and whirl obstructing elementsabove said beaters in the annular space between the chamber casing andthe delivery tube, and air suction means operating above such whirlobstructing elements.

3. In a ulverizer, the combination of a vertical pu verizer chamber; avertical shaft mounted in the chamber; a delivery tube mounted on theshaft; a deflector at the bottom of the delivery tube; and rotarybeaters mounted in the chamber and receiving the material from thedeflector; and whirl obstructing elements above said beaters in theannular space between the chamber casing and the delivery tube.

4. In a pulverizer, the combination of a vertical pulverizer chamber;rotary beaters in said chamber; a rotary delivery tube within thebeaters and extending from the top of the chamber to the bottom; and adeflector at the bottom of the tube deflecting the material outwardlyfrom the tube to the heaters.

5. In a ulverizer, the combination of a vertical pu verizer chamber;rotary beaters in said chamber; a rotary delivery tube within thebeaters and extending from the top of the chamber to the bottom; and adeflector at the bottom of the tube deflecting the material outwardlyfrom the tube to the beaters, said deflector plate being coneshaped.

6. In a pulverizer, the combination of a vertical pulverizer chamber;means for creating an upward draft through the chamber; rotar beaters inthe chamber; and a rotary delivery tube within the chamber extendingfrom the top of the chamber and delivering material to the beaters atthe bottom of the chamber.

7. In a pulverizer, the combination of a vertical pulverizer chamber;rotary beaters mounted in said chamber; a delivery tube within thebeaters extending from the top of the chamber and delivering material tothe bottom of the chamber; and means for creating a draft downwardlythrough .the tube and upwardly through the chamber at the outside of thetr e; and whirl-obstructing vanes above sa' beaters, extendingsubstantially horizon tally across the annular space between the chambercasing and the delivery tube.

8. In a pulverizer, the combination of a vertical pulverizer chamber;rotary beaters mounted in said chamber; a deliver tube within thebeaters extending from t e top of the chamber and delivering material toa vaeaa the bottom of the chamber; and means for creating a draftdownwardly through the tube and upwardly through the chamber at theoutside of the tube comprising a fan rotating with the beaters,comprising a suction fan operating above said beaters, and a whirlobstructing means between the beaters and the fan.

9. In a pulverizer, the combination of a vertical pulverizer chamber;rotary beaters mounted in said chamber; a deliver tube within thebeaters extending from t e top of the chamber and delivering material tothe bottom of the chamber; and means for creating a draft downwardlythrough the tube and upwardly through the chamber at the outside of thetube comprising a fan carried by the tube, and whirl obstructingelements above the beaters and below such fan.

10. In a pulverizer, the combination of a vertical chamber; a verticalshaft in the chamber; a tube mounted on the shaft; heaters in theannular space between the chamber casing and said tube; and a fanmounted on the tube, said fan being arranged to create an upward draftthrough the chamber; and whirl-obstructing vanes above said beaters,extending substantially horizontally across the annular space hetwbeenthe chamber casing and the delivery tu e.

11. In a pulverizer, the combination of a vertical chamber; a verticalshaft in the chamber; a tube mounted on the shaft; beaters in theannular space between the chamber casing and said tube; and a fanmounted on the tube, said fan being arranged to create a downward draftthrough the tube and an upward draft through the chamber.

12. In a pulverizer, the combination of a vertical shell having abreaker chamber in the lower part thereof and a pulverizer chambertherein of annular form above the breaker chamber; and a restrictionslate between the breaker chamber and the pulverizer chamber.

13. In a pulverizer, the combination of a vertical shell having abreaker chamber and a pulverizer chamber therein; a vertical shaft; atube on the shaft; breaker paddles arranged in the breaker chamber;pulverizer beaters carried by the tube and pulverizing chamber; and arestriction plate between the breaker chamber and the pulverizingchamber.

14. In a pulverizer, the combination of a vertical pulverizing chamberhavin a discharge at the top; means for de ivering material to thebottom of the chamber; and means for obstructing a rotary movement ofthe material as it is discharged from the pulverizing chamber,consisting of blade-like vanes substantially traversing the spacebetween the shaft and chamber walls.

Ill)

15. In a pulverizer, the combination of a vertical pulverizing chamber;a vertical shaft mounted in the chamber; a delivery tube mounted on theshaft; a beater mounted on the delivery tube; and means for obstructinga rotary movement of the material as ate is discharged from thepulverizing cham- 16. A pulverizing machine comprising a l casing, meansfor feeding to the lower portion of the casing the material to bepulverized, a shaft extending upwardly within the casing, pulverizingbeaters on the shaft, means for maintaining an upward progress of airthrough the casing, and whirl obstructing means above the pulverizingbeaters comprising blade-like transverse vanes.

In testimony whereof I have hereunto set my hand.

PAUL ARTHUR HIRSCH.

